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ptsf 8.9.0 Not compatible 👼

Context

# Packages matching: installed
# Name              # Installed # Synopsis
base-bigarray       base
base-threads        base
base-unix           base
camlp5              7.14        Preprocessor-pretty-printer of OCaml
conf-findutils      1           Virtual package relying on findutils
conf-perl           2           Virtual package relying on perl
coq                 8.7.1       Formal proof management system
num                 1.4         The legacy Num library for arbitrary-precision integer and rational arithmetic
ocaml               4.06.1      The OCaml compiler (virtual package)
ocaml-base-compiler 4.06.1      Official 4.06.1 release
ocaml-config        1           OCaml Switch Configuration
ocamlfind           1.9.5       A library manager for OCaml
# opam file:
opam-version: "2.0"
maintainer: "Hugo.Herbelin@inria.fr"
homepage: "http://www.andrew.cmu.edu/user/fpv/ptsf/"
license: "BSD"
build: [make "-j%{jobs}%"]
install: [make "install"]
remove: ["rm" "-R" "%{lib}%/coq/user-contrib/PTSF"]
depends: [
  "ocaml"
  "coq" {>= "8.9" & < "8.10~"}
  "coq-ptsatr" {>= "8.9" & < "8.10~"}
]
tags: [
  "keyword: pure type systems"
  "keyword: judgmental equality"
  "keyword: explicit equality proofs"
  "keyword: proof relevance"
  "category: Mathematics/Logic/Type theory"
]
authors: [
  "Floris van Doorn <fpv@andrew.cmu.edu> [http://www.andrew.cmu.edu/user/fpv/]"
  "Herman Geuvers <herman@cs.ru.nl> [http://www.cs.ru.nl/~herman/]"
  "Freek Wiedijk <freek@cs.ru.nl> [http://www.cs.ru.nl/~freek/]"
]
bug-reports: "https://github.com/coq-contribs/ptsf/issues"
dev-repo: "git+https://github.com/coq-contribs/ptsf.git"
synopsis: "Explicit Convertibility Proofs in Pure Type Systems"
description: """
Formalization of the proof that PTS and PTS with explicit convertibility proofs (PTSf) are equivalent."""
flags: light-uninstall
url {
  src: "https://github.com/coq-contribs/ptsf/archive/v8.9.0.tar.gz"
  checksum: "md5=50a1ba7f563da4d36e0134a706612c4a"
}

Lint

Command: true
Return code: 0

Dry install 🏜️

Dry install with the current Coq version:

Command

opam install -y --show-action coq-ptsf.8.9.0 coq.8.7.1

Return code

5120

Output

[NOTE] Package coq is already installed (current version is 8.7.1).
The following dependencies couldn't be met:
  - coq-ptsf -> coq >= 8.9 -> ocaml >= 4.09.0
      base of this switch (use `--unlock-base' to force)
Your request can't be satisfied:
  - No available version of coq satisfies the constraints
No solution found, exiting

Dry install without Coq/switch base, to test if the problem was incompatibility with the current Coq/OCaml version:

Command: opam remove -y coq; opam install -y --show-action --unlock-base coq-ptsf.8.9.0
Return code: 0

Install dependencies

Command: true
Return code: 0
Duration: 0 s

Install 🚀

Command: true
Return code: 0
Duration: 0 s

Installation size

No files were installed.

Uninstall 🧹

Command: true
Return code: 0
Missing removes: none
Wrong removes: none